2 papers
cond-mat.str-el2004
The Hubbard model at half-filling, part III: the lower bound on the self-energy
Stephane Afchain, Jacques Magnen, Vincent Rivasseau
We complete the proof that the two-dimensional Hubbard model at half-filling is not a Fermi liquid in the mathematically precise sense of Salmhofer, by establishing a lower bound o…
cond-mat.str-el2004
Renormalization of the 2-point function of the Hubbard model at half-filling
Stephane Afchain, Jacques Magnen, Vincent Rivasseau
We prove that the two dimensional Hubbard model at finite temperature T and half-filling is analytic in the coupling constant in a radius at least . We also study the…